How many molecules (not moles) of NH3 are produced from 6.36*10^-4g of H2

Answer 1

To find the number of molecules of something, we need to first find the number of moles and then use Avogadro's number to convert to molecules. For this problem, we proceed as follows:

Molar mass NH₃ = 17 g/mole

Molar mass H₂ = 2 g/mole

Balanced equation for production of NH₃: N₂ + 3H₂ ==> 2NH₃

moles of H₂ used = 6.36x10^-4 g x 1 mole/2 g = 3.18x10^-4 moles H₂

moles NH₃ produced = 3.18x10^-4 moles H₂ x 2 moles NH₃/3 moles H₂ = 2.12x10^-4 moles NH₃

Molecules of NH₃ produced = 2.12x10^-4 moles x 6.02x10²³ molecules/mole = 1.28x10²⁰ molecules